CN106062859A - Time compensation-based LED system - Google Patents

Time compensation-based LED system Download PDF

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Publication number
CN106062859A
CN106062859A CN201480076566.0A CN201480076566A CN106062859A CN 106062859 A CN106062859 A CN 106062859A CN 201480076566 A CN201480076566 A CN 201480076566A CN 106062859 A CN106062859 A CN 106062859A
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China
Prior art keywords
led
pulse width
activation
controller
green
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谢敏仪
王敏华
林玉树
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Texas Instruments Inc
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Texas Instruments Inc
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0653—Controlling or limiting the speed of brightness adjustment of the illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

Provided is a light-emitting diode (LED) system (10). The LED system (10) includes an LED array (12) comprising a plurality of LEDs that are each activated to provide an LED current to provide illumination in one of a plurality of colors. The LED system (10) also includes an LED controller (14) configured to activate the plurality of LEDs based on a digital input (DIG_IN) comprising grayscale data corresponding to activation of the plurality of LEDs and further comprising compensation time data corresponding to an activation pulse-width of each of the plurality of LEDs based on a respective one of the plurality of colors of the respective each one of the plurality of LEDs to maintain a substantially equal activation time of the plurality of LEDs.

Description

LED information display system based on time bias
Technical field
The present invention relates generally to electronic circuit system, and relates more specifically to a kind of LED information display system based on time bias.
Background technology
Based on consumer's requirement to more preferably picture quality, light emitting diode (LED) string is used to replace at display (such as Television set, the monitor of laptop computer or LED show wall) backlight illumination in the fluorescent lamp that uses be significantly increased. Additionally, typical LED light efficiency can be much better than the conventional lighting systems for this class display, therefore consume less power.This Outward, among other advantages, LED information display system also can less and more environment friendly, and can launch in less electromagnetic interference (EMI) Time there is faster response.For typical LED display system, there is several LED regulation technologies.The allusion quotation for display can be implemented Type LED display system may utilize the LED of different colours, such as can be combined to show the redness of trillion different colours, green and Blue.But, LED based on different colours physical characteristic relative to each other, LED can deviate different voltage amplitude.Therefore, aobvious Show that device can experience the disappearance (such as, in low GTG environment) of the uniformity of the color across display.
Summary of the invention
One example comprises a kind of light emitting diode (LED) system.Described LED information display system comprises the LED battle array including multiple LED Row, the plurality of LED respectively hangs oneself and activates to provide LED current a kind of with provide in multiple color by the plurality of LED Illumination.Described LED information display system also comprises the LED controller being configured to activate the plurality of LED based on numeral input, described numeral Input include the luma data of activation corresponding to the plurality of LED and farther include corresponding in the plurality of LED every The compensation time data of the sensitizing pulse width of one is to maintain the plurality of LED's to be substantially identical activationary time, described benefit Repay the corresponding one in the described multiple color of time data corresponding each based on the plurality of LED.
Another example comprises a kind of for the method activating the LED in light emitting diode (LED) system.Described method comprises Receiving numeral input, it includes defining the luma data of the nominal Active pulse width of described LED and defining the extra of described LED The compensation time data of sensitizing pulse width.Described method also comprise based on described compensation time data calculate define described LED Compensation time of sensitizing pulse width.Described method also comprise produce be associated with described LED have equal to described nominal Sensitizing pulse width and described compensation time and the activation signal of described sensitizing pulse width.Described method comprises further Described LED is activated via described activation signal.
Another example comprises a kind of LED information display system.Described system comprises the LED array including multiple LED.The plurality of LED Comprising red LED, green LED and blue led, it is respectively hung oneself and activates to provide by the LED current of the plurality of LED to provide Illumination.Described system comprises LED controller further, and it is configured to receive and includes luma data and compensate the number of time data Word inputs.Described LED controller comprises compensation time controller, and it is right that it is configured to calculate based on described compensation time data The sensitizing pulse width of green LED described in Ying Yu and described blue led is relative to the increasing of the sensitizing pulse width of described red LED The compensation time added.Described LED controller also comprises active controller, and it is configured to based on described luma data and described benefit Time of repaying produces the activation signal with described corresponding sensitizing pulse width for described redness, green and blue led.Described LED controller comprises multiple LED driver further, and it is configured to activate described redness, green based on described activation signal And blue led.
Accompanying drawing explanation
Fig. 1 illustrates the example of LED information display system.
Fig. 2 illustrates another example of LED information display system.
Fig. 3 illustrates the example of LED controller.
Fig. 4 illustrates the example of sequential chart.
Fig. 5 illustrates another example of sequential chart.
Fig. 6 illustrates the example of display system.
Fig. 7 explanation is for activating the example of the method for the LED in LED information display system.
Detailed description of the invention
The present invention relates generally to electronic circuit system, and relates more specifically to a kind of LED information display system based on time bias. LED information display system comprises LED array and LED controller.As an example, LED array can comprise red LED, green LED and blue led, And can implement in LED display system (such as, television set, computer monitor or LED show wall).LED controller can receive Numeral input, it can comprise the luma data of the activation corresponding to LED and may correspond to green and/or blue led relative to red The compensation time data of the extra sensitizing pulse width of color LED.As an example, numeral input can be from the image processor being associated There is provided.LED controller can comprise compensation time controller, and it is configured to based on compensating the time data calculating compensation time to carry Supply green and/or blue led relative to the longer sensitizing pulse width of red LED to provide in red, green and blue led Each sharp reviver is substantially identical activationary time.
LED controller can comprise enumerator, and it is configured to the pulse letter received relative to (such as, from image processor) Number pulse width the dock cycles of clock signal is counted.Therefore enumerator can calculate the reference time so that compensate time number According to the nominal Active pulse width that can define with given green or blue led sensitizing pulse width (such as, as by luma data circle The part of the reference time being added calmly).As an example, when nominal Active pulse width may correspond to activate with the theory of LED Between the pulse width that is associated.Therefore, the parasitism being associated based on each in, green red with corresponding and blue led Therefore electric capacity, can be adjusted differently than the persistent period of the activation of corresponding LED, the therefore substantially phase of each in maintenance LED Etc. effective activationary time such as to provide the Uniform Illumination of LED in low ash order conditions.As another example, compensate time data (such as, it can approximate can to define the extra sensitizing pulse width of the green beyond nominal Active pulse width and/or blue led Sensitizing pulse width equal to red LED).Therefore, compensating time controller can be by extra sensitizing pulse width and nominal Active Pulse width is added to provide the green and/or sensitizing pulse width of blue led.Additionally, LED controller can further include sharp Speed control alive, it is configured to the rate of activation of LED be set to the constant speed of such as red LED and for green And/or be dynamic and/or independent speed for blue led.Therefore, can substantially alleviate and result from electromagnetic interference (EMI) Noise.
Fig. 1 illustrates the example of light emitting diode (LED) system 10.LED information display system 10 can in multiple display application (such as, Wall is shown at computer monitor, television set or LED) middle enforcement.LED information display system 10 comprises LED array 12, described LED array 12 Comprise multiple LED of the illumination that multiple different colours is provided.As an example, LED array 12 can comprise red LED, green LED and Blue led, it is arranged in the array of rows and columns to provide the corresponding illumination of display screen.LED information display system 10 also comprises LED controller 14, it is configured to respond to digital input signals DIG_IN and activates the LED in LED array 12.As an example, numeral input Signal DIG_IN can provide from image processor (not shown), and described image processor is configured to process view data to control Many groups LED in LED array 12 activates the image being associated with display.As an example, digital input signals DIG_IN can boundary Determine the nominal Active pulse width of LED in LED array 12.
In the example of fig. 1, LED controller 14 comprises active controller 16 and one group of LED driver 18.Active controller 16 are configured to produce one group of activation signal based on numeral input DIG_IN, and LED driver 18 is configured to activate LED array LED in 12.As an example, LED driver 18 can be arranged to any one in multiple Amplifier type, described amplifier class Type is through switchably controlling with initial current by the LED in LED array 12, and described electric current is shown as many in the example of fig. 1 Individual electric current ID1To IDN, wherein N is positive integer.Such as, electric current ID1To IDNIn each may correspond to and example in LED array 12 The separation respective channel being associated such as the row of the LED of individual scanning line by line.Therefore, the LED in LED array 12 can be based on electric current ID1To IDNThere is provided and illuminate part accordingly.Additionally, in the example of fig. 1, LED controller 14 comprises compensation time controller 20, It is configured to the pulse width activating corresponding activation signal arranging the LED in LED array to provide the approximately equal of LED to swash Live time, and therefore provide the essence uniformity of the illumination of the LED of all colours in LED array, as described herein.
Owing to LED modules with different colors physical characteristic relative to each other, the forward bias voltage of LED modules with different colors can be each other Different.Such as, the forward bias voltage of red LED can approximate between 1.8V and 2.5V, and the green or forward of blue led Bias voltage can approximate between 2.8V and 3.5V.Therefore, red LED can have less than green and the forward bias of blue led Put threshold voltage.As another example, green LED can be typically below the forward bias threshold voltage of blue led.Therefore, In view of approximately equal LED current is based on increasing to relevant for red LED quickly relative to green and blue led activation voltage The threshold value of connection, the ON time of red LED is smaller than (that is, being faster than) green and the ON time of blue led.Such as institute herein Stating, term " ON time " refers to asserting and increasing to forward bias threshold value based on the voltage delay across LED of sensitizing pulse It is associated the persistent period between the gained activation of LED.As another example, green LED can similarly have less than (such as, It is faster than) ON time of blue led.Therefore, in view of red, the green and constant active pulse width of blue led and the reddest The constant of the LED current of color, green and blue led, ON time difference may result in red LED relative to green And/or the different activationary times (such as, and green LED is relative to the various durations of blue led) of blue led.As herein Described in, term " activationary time " refers to that LED activates and provide the persistent period of illumination.Due to red, green and blue led Activationary time is poor, and the display being associated especially can experience non-uniformity in low ash order conditions, and it can be in the display being associated The part of device produces non-required blush adjust.
Fig. 2 illustrates another example of LED information display system 50.LED information display system 50 may correspond to the LED information display system 10 in the example of Fig. 1.Cause This, with reference to the example of Fig. 1 in the following description of the example of Fig. 2.
LED information display system 50 comprises LED array 52, and described LED array 52 comprises red LED DR, green LED DGAnd blue led DB.In the example of figure 2, red LED DR, green LED DGAnd blue led DBEach since LED voltage VLEDReceive power.Should Understand, red LED DR, green LED DGAnd blue led DBFor simplicity the LED in only LED array 52 it is shown as, But LED array 52 can comprise the more LED being arranged to rows and columns, such as scan (such as, eight behavior one group) by indivedual row.? In the example of Fig. 2, red LED DRComprise the capacitor parasitics C being arranged in parallelPR, green LED DGComprise the parasitism being arranged in parallel Capacitor CPG, and blue led DBComprise the capacitor parasitics C being arranged in parallelPB。
LED information display system 50 also comprises LED controller 54, and described LED controller 54 comprises and red LED DRBe associated One LED driver 56 and green LED DGThe second LED driver 58 of being associated and with blue led DBThe 3rd LED being associated Driver 60.First LED driver 56 activates to provide electric current I in response to activation signal ACTRDRBy red LED DR.Class As, the second LED driver 58 activates to provide electric current I in response to activation signal ACTGDGBy green LED DG, and the 3rd LED driver 56 activates to provide electric current I in response to activation signal ACTBDBBy blue led DB.Additionally, in the reality of Fig. 2 In example, LED driver 56,58 and 60 receives the signal AS corresponding to rate of activation, as described herein.Such as, signal AS can Define phase induced current IDR、IDGAnd IDBIncrease such as to control electromagnetic interference (EMI) transmitting relevant to LED controller 54 (such as Calculate the compensation time based on corresponding) time speed.Although LED driver 56,58 and 60 be shown as being coupled to single accordingly Red LED DR, green LED DGAnd blue led DB, it is to be appreciated that LED driver 56,58 and 60 can be coupled to identical Or the row (such as, the row of eight LED) of the LED of different colours.
In response to electric current IDR, it is provided that across red LED DRForward bias voltage VDRWith the red LDE D of illuminationR.In response to Electric current IDG, it is provided that across green LED DGForward bias voltage VDGTo illuminate green LED DG.In response to electric current IDB, it is provided that across indigo plant Color LED DBForward bias voltage VDBTo illuminate blue led DB.Therefore, based on across corresponding red LDD DR, green LED DGAnd blue led DBCapacitor parasitics CPR、CPGAnd CPB, corresponding ON time TTR、TTGAnd TTBCan such as be expressed as follows:
TTR=CPR*VDR/IDREquation 1
TTG=CPG*VDG/IDGEquation 2
TTB=CPB*VDB/IDBEquation 3
Therefore, the activationary time T that red with corresponding, green and blue led is associatedAR、TAGAnd TABCan be expressed as follows:
TAR=TACTR-TTREquation 4
TAG=TACTG-TTGEquation 5
TAB=TACTB-TTBEquation 6
Wherein: TACTRPulse width corresponding to activation signal ACTR；
TACTGPulse width corresponding to activation signal ACTG；And
TACTBPulse width corresponding to activation signal ACTB.
Therefore, equation 1 to 6 shows ON time TTR、TTGAnd TTB, activationary time TAR、TAGAnd TABAnd activate letter accordingly Pulse width T of number ACTR, ACTG and ACTBACTR、TACTGAnd TACTBBetween relation.Because forward bias voltage VDR、VDGAnd VDBCan different from each other and because LED current IDR、IDGAnd IDBCan be different from each other, so ON time TTR、TTGAnd TTBCan be different, its The ON time T of middle red LEDTRIt is the shortest.Therefore, in view of the approximately equal of corresponding activation signal ACTR, ACTG and ACTB Pulse width TACTR、TACTGAnd TACTB, the activationary time T of red LEDTRCan be the longest.Therefore, the light-emitting diode display being associated Especially can show blush in low ash order conditions to adjust.
Referring back to the example of Fig. 1, compensate time controller 20 and can be configured to calculate the compensation time so that activate and control Device 16 can be configured with according to suitable pulse duration TACTR、TACTGAnd TACTBProduce activation signal (such as, ACTR, ACTG and ACTB) such as to maintain the LED's of the activation of LED array 12 to be substantially identical activationary time TAR、TAGAnd TAB.Therefore, it is associated Display especially can experience and substantially show the uniformity in low ash order conditions.Such as, numeral input DIG_IN can comprise boundary Luma data (the nominal Active pulse width such as, comprising LED of the fixed activation data being associated with the LED in LED array 12 Degree) and can comprise with other color LED (such as, green and/or blue led) relative to the volume of the red LED in LED array 12 The compensation time data that outer activationary time is associated.Therefore, compensating time controller 20 can be based in numeral input DIG_IN Compensate time data and calculate the compensation time.
As an example, active controller 16 can be by compensation time and the nominal Active pulse width such as defined by luma data Be added pulse width to produce the activation corresponding to green and/or blue led (such as, respectively activation signal ACTG and/or Pulse width T of ACTBACTGAnd/or TACTB).In the example of fig. 1, LED controller 14 receives clock signal clk.As reality Example, clock signal clk can be produced by external clock, or can be produced by the clock within LED controller 14.Compensate time controller The 20 compensation times that can be configured other color LED producing LED array 12 with circulation based on clock signal clk, as herein Described in.
Fig. 3 illustrates the example of LED controller 100.LED controller 100 may correspond to the LED in the example of Fig. 1 and 2 respectively Controller 14 and 54.Therefore, with reference to the example of Fig. 1 and 2 in the following description of the example of Fig. 3.
LED controller 100 comprises enumerator 102, and it receives the clock letter such as provided from image controller (not shown) Number CLK and pulse signal PLS.Enumerator 102 is configured to such as count the cycle-index of clock signal clk to determine pulse The pulse width of signal PLS.Such as, enumerator can determine based on the cycle-index occurred when pulse signal PLS is asserted Pulse width is to determine the pulse width of pulse signal PLS.As described herein, term " circulates " and can be used for describing clock signal The whole cycle in the cycle of CLK or partial periodicity (such as, logic high and logic low portion).As described previously, clock signal clk Can provide from external clock or can provide via the clock within LED controller 100.
Reference signal REF of the pulse width that enumerator 102 would correspond to pulse signal PLS provides the compensation time to control Device 104 (such as corresponding to the compensation time controller 20 in the example of Fig. 1).When compensation time controller 104 also receives compensation Between data CTF, its such as can be included in numeral input DIG_IN in or as its part.Therefore compensating time controller 104 can be It is configured to calculate green and/or the compensation time of blue led of LED array 12.As an example, time factor data are compensated CTF may correspond to be multiplied by and/or divided by the variable of the pulse width defined by reference signal REF to determine green and/or blueness The compensation time of LED.Such as, compensate time factor data CTF and may correspond to the first multiplier compensating the time and the indigo plant of green LED Second multiplier compensating the time of color LED.Therefore, compensate time controller 104 and can be multiplied by first based on reference signal REF respectively And second multiplier, calculate the compensation time CT of green LED divided by constantGAnd the compensation time CTB of blue led, as follows:
CTG=REF*M/K equation 7
CTB=REF*N/K equation 8
Wherein: M is corresponding to the first multiplier being associated with green LED, as defined by compensation time data CTF；
N is corresponding to the second multiplier being associated with blue led, as defined by compensation time data CTF；
K is corresponding to the constant (such as, 32) being associated with the maximum of first and second multiplier.
LED controller 100 also comprises active controller 106, and it may correspond to the active controller 16 in the example of Fig. 1. Therefore, active controller 106 is configured to produce and is associated with red LED, green LED and the blue led of LED array 12 respectively Activation signal ACTR, ACTG and ACTB.Active controller 106 receives compensation time CT (example from compensating time controller 104 As, comprise compensation time CTGAnd CTB) and such as can be included in numeral input DIG_IN or as the luma data of its part GSD.As an example, luma data GSD can comprise the luma data that each different colours with the LED in LED array is associated GSD (such as, such as comprises the nominal Active pulse width of the LED of each color in LED array 12).Therefore, control is activated Device 106 can therefore based on luma data GSD and compensate time CT calculate the corresponding red LED of LED array 12, green LED and The pulse width of activation signal ACTR, ACTG and ACTB of each in blue led.As an example, luma data GSD can boundary Determine nominal pulse width, such as, be approximately equal to pulse width T of the red LED of LED array 12ACTR.Therefore, activation signal ACTR Can have pulse width T without additional compensation the definition for the period by luma data GSDACTR.But, active controller 106 can be through Configure to be added with the nominal pulse width such as defined by luma data GSD to determine dividing of LED array 12 by compensating time CT Green and/or the sensitizing pulse width T of blue ledACTGAnd/or TACTB.Such as, active controller 106 can define activation as follows The sensitizing pulse width T of signal ACTGACTGAnd the sensitizing pulse width T of activation signal ACTBACTB:
TACTG=TACTN+CTGEquation 9
TACTB=TACTN+CTBEquation 10
Wherein: TACTNNominal pulse width corresponding to activation signal.As an example, TACTNCan be approximately equal to as red, green Color and the T of common one group of luma data GSD of blue ledACTR。
Therefore, active controller 106 can produce activation signal ACTR, ACTG and ACTB for having corresponding sensitizing pulse width Degree TACTR、TACTGAnd TACTBFor activating corresponding LED DR、DGAnd DBTo maintain approximately equalised activationary time TAR、TAGAnd TAB Substantially Uniform Illumination is provided on the display being associated in low GTG.
Additionally, in the example of fig. 3, LED controller 100 comprises rate of activation controller 108, and it is configured to based on benefit Repay time data CTF and control LED DR、DGAnd DBRate of activation.As described herein, term " rate of activation " describes LED DR、DGAnd DBThe linearly or nonlinearly speed of activation, and therefore define the LED D being associatedR、DGAnd DBON time TTR、 TTGAnd TTB.As an example, the rate of activation of red LED can be set to constant rate of speed by rate of activation controller 108, and can example Rate of activation such as each that is dynamic based on the compensation time CT calculated and that be separately provided in green and/or blue led.Example As, rate of activation controller 108 can arrange the rate of activation of green LED via the first multiplier M and arrange indigo plant via the second multiplier N The rate of activation of color LED, as provided by equation 4 and 5.Additionally, rate of activation for the longer compensation time be provided as relatively slow and It is provided as comparatively fast for the shorter compensation time so that red LED can have the shortest rate of activation.Rate of activation information is from activation Speed control 108 provides the signal AS as the LED driver 56,58 and 60 in the example being provided to Fig. 2.Due to based on Compensation time CT controls rate of activation, and the EMI that can substantially alleviate the activation from the LED in LED array launches.Therefore, bag The printed circuit board (PCB) (PCB) being associated of the LED containing LED array 12 can with more compact mode based on may result in adjacent groups conductor it Between the minimizing of noise of crosstalk and design.
Fig. 4 illustrates the example of sequential Figure 150.Sequential Figure 150 may correspond to the sequential of the signal described in the example of Fig. 3. Therefore, with reference to the example of Fig. 3 in the following instance of Fig. 4.
Sequential Figure 150 shows clock signal clk, pulse signal PLS, activation signal ACTR, voltage VDR, activation signal ACTG, voltage VDG, activation signal ACTB and voltage VDB.At time T0Place, pulse signal PLS asserts logic from logic low state High state, and at time T1Place, pulse signal PLS deasserts logic low state from logic high state.As described previously, meter Number device 102 can be configured to count the circulation of clock signal clk (such as, cycle or half period) to determine pulse signal PLS Pulse width (that is, from time T0To time T1), it can be provided that compensation time controller 104 is as reference signal REF. Therefore, together with compensating time data CTF, compensate time controller 104 and can be configured to calculate green LED DGAnd blue led DB The compensation time.Therefore, compensate time controller 104 and can provide active controller 106 by compensating time CT.
In response to receiving compensation time CT and in response to luma data GSD, active controller 106 can produce activation signal ACTR, ACTG and ACTB.At time T2Place, active controller 106 asserts activation signal ACTR, ACTG and ACTB.In response to swashing Signal ACTR, ACTG and ACTB alive assert, voltage VDR、VDGAnd VDBStart along with corresponding capacitor parasitics CPR、CPGAnd CPB By electric current IDR、IDGAnd IDBCharge and increase.Voltage VDR、VDGAnd VDBSlope and therefore LED DR、DGAnd DBRate of activation can Defined by the signal AS provided by rate of activation controller 108.As an example, across red LED DRVoltage VDRMay indicate that Default rate for of a relatively high slope increases.Activation signal ACTR has can be by the nominal Active provided in luma data GSD Pulse width T of the definition for the periodACTR, it is shown as from time T2To time T3Persistent period (that is, the clock in the example of Fig. 4 Five half cycle of signal CLK).Start from time T2, voltage VDRIncrease to forward bias threshold value and activation signal ACTR's Remainder keep constant.Therefore, voltage VDRIncrease define red LED DRON time TTR(showing at 152).Cause This, pulse width TACTRRemainder corresponding to activationary time TAR(showing at 154).At time T3Place, activation signal ACTR It is deasserted, and voltage VDRDecline (that is, with approximation and voltage V with the speed that approximation is identical with rate of activationDRWhen starting from Between T2Increase equal and contrary slope de-assert).
This external time T2Place, across green LED DGVoltage VDGCan based on such as by signal AS via rate of activation control The calculating that device 108 provides compensates time CTGRate of activation increase.Therefore, voltage VDGCan have less slope to provide green LED DGRelative to red LED DRSlower rate of activation.Activation signal ACTG has and is shown as from time T2To time T4 Pulse width T of persistent periodACTG(that is, three complete cycle of the clock signal clk in the example of Fig. 4), it is based on benefit Repay time CTGComprise and be longer than pulse width TACTR.Such as, compensate time controller 104 to can be configured with by activation signal The compensation time CT of ACTGGIt is calculated as the Part I of the pulse width of pulse signal PLS, as by reference signal REF such as base Determine in the first multiplier M and constant K of part of the pulse width as pulse signal PLS.Compensation time CTGCan therefore with Nominal pulse width TACTNIt is added (such as, equal to time T2With time T3Between pulse width TACTR) to provide activation signal Pulse width T of ACTGACTG.Start from time T2Place, voltage VDG(it can be more than voltage V to increase to forward bias threshold valueDRReach Forward bias threshold value) and keep constant in the whole remainder of activation signal ACTG.Therefore, voltage VDGIncrease define Green LED DGON time TTG(showing at 156).Therefore, pulse width TACTGRemainder corresponding to activationary time TAG (showing at 158).At time T4Place, activation signal ACTG is deasserted, and voltage VDGIdentical with rate of activation with approximation Speed declines (that is, with approximation and voltage VDGStart from time T2Increase equal and contrary slope de-assert).
This external time T2Place, across blue led DBVoltage VDBCan based on such as by signal AS via rate of activation control The calculating that device 108 provides compensates time CTBRate of activation increase.Therefore, voltage VDBCan have less slope to provide blue LED DBRelative to green LED DBSlower rate of activation.Activation signal ACTB has and is shown as from time T2To time T5 Pulse width T of persistent periodACTB(that is, seven half cycle of the clock signal clk in the example of Fig. 4), it is based on compensation Time CTBComprise and be longer than pulse width TACTRAnd TACTG.Such as, compensate time controller 104 to can be configured to believe activation The compensation time CT of number ACTBBIt is calculated as the Part II of the pulse width of pulse signal PLS, as by reference signal REF such as Second multiplier N of part based on the pulse width as pulse signal PLS and constant K and determine.As described herein, pulse " Part I " and " Part II " of the pulse width of signal PLS is not intended to indicate mutually exclusive part, but sign can The unitary part of the pulse width of equal pulse signal PLS.Compensation time CTBCan therefore with nominal pulse width TACTNIt is added (such as, equal to time T2With time T3Between pulse width TACTR) to provide pulse width T of activation signal ACTBACTB.Open Start from time T2Place, voltage VDB(it can be more than voltage V to increase to forward bias threshold valueDBThe forward bias threshold value reached) and swashing The whole remainder of signal ACTB alive keeps constant.Therefore, voltage VDBIncrease define blue led DBON time TTB(showing at 160).Therefore, pulse width TACTBRemainder corresponding to activationary time TAB(showing at 162).At time T5 Place, activation signal ACTB is deasserted, and voltage VDBWith the approximation speed identical with rate of activation decline (that is, with approximation and Voltage VDBStart from time T2Increase equal and contrary slope de-assert).
Therefore, independent pulse width T based on corresponding activation signal ACTR, ACTG and ACTBACTR、TACTGAnd TACTB, red Color LED DR, green LED DGAnd blue led DBCan all have approximately equalised activationary time TAR、TAGAnd TAB.Therefore, LED DR、DGAnd DBThe substantially uniform strength of the display being associated in low ash order conditions can be provided.In the example in figure 4, though So voltage VDR、VDGAnd VDBDecline with the speed identical with corresponding rate of activation, it is to be appreciated that voltage VDR、VDGAnd VDBNot purport It is being limited to this.As an example, voltage VDR、VDGAnd VDBCan decline statically with identical speed, or can be identical with rate of activation Mode is such as dynamically arranged based on rate of activation itself (such as, based on calculating compensation time CT).
Referring back to the example of Fig. 3, enumerator 102 only determines the function of the pulse width of the pulse signal PLS of reception It it is an example of the mode that wherein can calculate compensation time CT.As another example, LED controller 100 can omit counting Device 102 makes clock signal LCK be provided to compensate time controller 104.In this example, compensate time data CTF can wrap Containing the data being associated with extra activationary time, such as in the circulation or cyclic part of clock signal clk, extra activationary time Corresponding to pulse width T with corresponding activation signal ACTG and ACTBACTGAnd TACTBNominal pulse width be added compensation time Between.Therefore, in this example, can be in the case of without multiplication and division and therefore with when more computational efficiency mode calculates compensation Between.Additionally, compensate time controller 104 can implement second clock signal, such as, it is multiplied by based on by the frequency of clock signal clk The method factor produces second clock signal to provide the more fine increments of compensation time CT.
Fig. 5 illustrates another example of sequential Figure 200.Sequential Figure 200 may correspond to the signal described in the example of Fig. 3 time Sequence.Therefore, with reference to the example of Fig. 3 in the following instance of Fig. 5.
Sequential Figure 200 shows the first clock signal clk, second clock signal HCLK, activation signal ACTR, voltage VDR, swash Live signal ACTG, voltage VDG, activation signal ACTB and voltage VDB.In the example of fig. 5, second clock signal HCLK has closely Seemingly double the frequency of the frequency of the first clock signal clk.As an example, second clock signal HCLK can be based on by the first clock The frequency of signal CLK is multiplied by multiplication factor (such as, 2) and produces.At time T0At time before, compensate time controller 104 can have been received by compensating time data CTF and can calculating the compensation time, such as time with second based on compensating time data CTF The half cycle of clock signal HCLK is unit.Therefore, compensate time controller 104 and can provide active controller by compensating time CT 106。
In response to receiving compensation time CT and in response to luma data GSD, active controller 106 can produce activation signal ACTR, ACTG and ACTB.At time T0Place, active controller 106 asserts activation signal ACTR, ACTG and ACTB.In response to swashing Signal ACTR, ACTG and ACTB alive assert, voltage VDR、VDGAnd VDBStart along with corresponding capacitor parasitics CPR、CPGAnd CPB By electric current IDR、IDGAnd IDBCharge and increase.Voltage VDR、VDGAnd VDBSlope and therefore LED DR、DGAnd DBRate of activation can Defined by the signal AS provided by rate of activation controller 108.As an example, across red LED DRVoltage VDRMay indicate that Default rate for of a relatively high slope increases.Activation signal ACTR has can be by the nominal Active provided in luma data GSD Pulse width T of the definition for the periodACTR, it is shown as from time T0To time T1Persistent period (that is, second in the example of Fig. 5 Nine half periods of clock signal HCLK).Start from time T0, voltage VDRIncrease to forward bias threshold value and at activation signal The remainder of ACTR keeps constant.Therefore, voltage VDRIncrease define red LED DRON time TTR(exhibition at 202 Show).Therefore, pulse width TACTRRemainder corresponding to activationary time TAR(showing at 204).At time T1Place, activates letter Number ACTR is deasserted, and voltage VDRDecline (that is, with approximation and voltage V with the speed that approximation is identical with rate of activationDROpen Start from time T0Increase equal and contrary slope de-assert).
This external time T0Place, across green LED DGVoltage VDGCan based on such as by signal AS via rate of activation control The calculating that device 108 provides compensates time CTGRate of activation increase.Therefore, voltage VDGCan have less slope to provide green LED DGRelative to red LED DRSlower rate of activation.Activation signal ACTG has and is shown as from time T0To time T2 Pulse width T of persistent periodACTG(that is, 11 half cycle of the second clock signal HCLK in the example of Fig. 5), its base In compensating time CTGComprise and be longer than pulse width TACTR.Such as, compensate time controller 104 to can be configured with based on compensation First number of the circulation of the second clock signal HCLK provided in time data CTF calculates the compensation time of activation signal ACTG CTG.Compensation time CTGCan therefore with nominal pulse width TACTNIt is added (such as, equal to time T0With time T1Between pulse width Degree TACTR) to provide pulse width T of activation signal ACTGACTG.Start from time T0Place, voltage VDGIncrease to forward bias threshold (it can be more than voltage V to valueDRThe forward bias threshold value reached) and keep constant in the whole remainder of activation signal ACTG. Therefore, voltage VDGIncrease define green LED DGON time TTG(showing at 206).Therefore, pulse width TACTGSurplus More than correspond partly to activationary time TAG(showing at 208).At time T2Place, activation signal ACTG is deasserted, and voltage VDG Decline (that is, with approximation and voltage V with the speed that approximation is identical with rate of activationDGStart from time T0Increase equal and contrary Slope de-assert).
This external time T0Place, across blue led DBVoltage VDBCan based on such as by signal AS via rate of activation control The calculating that device 108 provides compensates time CTBRate of activation increase.Therefore, voltage VDBCan have less slope to provide blue LED DBRelative to green LED DBSlower rate of activation.Activation signal ACTB has and is shown as from time T0To time T3 Pulse width T of persistent periodACTB(that is, 13 half cycle of the second clock signal HCLK in the example of Fig. 5), its base In compensating time CTBComprise and be longer than pulse width TACTRAnd TACTG.Such as, compensate time controller 104 to can be configured with base Second number in the circulation compensating the second clock signal HCLK provided in time data CTF calculates the benefit of activation signal ACTB Repay time CTB.Compensation time CTBCan therefore with nominal pulse width TACTNIt is added (such as, equal to time T0With time T1Between Pulse width TACTR) to provide pulse width T of activation signal ACTBACTB.Start from time T0Place, voltage VDBIncrease to forward (it can be more than voltage V to offset thresholdDBThe forward bias threshold value reached) and protect in the whole remainder of activation signal ACTB Hold constant.Therefore, voltage VDBIncrease define blue led DBON time TTB(showing at 210).Therefore, pulse width TACTBRemainder corresponding to activationary time TAB(showing at 212).At time T3Place, activation signal ACTB is deasserted, And voltage VDBDecline (that is, with approximation and voltage V with the speed that approximation is identical with rate of activationDBStart from time T0Increase phase Deng and contrary slope de-assert).
Therefore, it is similar to previously described, independent pulse width based on corresponding activation signal ACTR, ACTG and ACTB TACTR、TACTGAnd TACTB, red LED DR, green LED DGAnd blue led DBCan all have approximately equalised activationary time TAR、TAGAnd TAB.Therefore, LED DR、DGAnd DBThe display being associated the most uniform in low ash order conditions can be provided Intensity.In the example of fig. 5, although voltage VDR、VDGAnd VDBDecline with the speed identical with corresponding rate of activation, but answer Solve, voltage VDR、VDGAnd VDBIt is not limited to this.As an example, voltage VDR、VDGAnd VDBCan decline statically with identical speed, Or can be identical with rate of activation mode such as dynamic based on rate of activation itself (such as, based on calculate compensation time CT) Ground is arranged.
Fig. 6 illustrates the example of display system 250.Display system 250 may correspond to the display system for computer, such as Computer monitor or LED television.Display system 250 comprises image processor 252, and it can be configured with such as in response to electricity Depending on producing view data in machine system or from the broadcast communication signal of the processor in computer system.Display system 250 Also comprising light-emitting diode display 254, it receives the view data of the numeral input DIG_IN in the example being shown as Fig. 6.As reality Example, light-emitting diode display 254 can be LED television or computer monitor.Being similar to previously described, numeral input DIG_IN can be because of This comprises luma data GSD and compensates time data CTF, and described compensation time data CTF specifies green and/or blue led phase Additional pulse width for the activation signal of red LED.Light-emitting diode display 254 comprises and is such as similar in the example of Fig. 1 LED control in the LED array 256 of LED array 12 and the example of LED controller 14 or Fig. 3 that is such as similar in the example of Fig. 1 The LED controller 258 of device 100 processed.Therefore, LED controller 258 can implement numeral input DIG_IN with such as based on except redness The time that compensates of the LED of outer color activates the LED in LED array 256.Therefore, light-emitting diode display 254 can be such as at low GTG In condition based on the activationary time of LED is set to approximately equal with substantially non-uniform manner provide illumination, as described herein.
In view of above-described aforementioned structure and functional character, some method will be best understood by with reference to Fig. 7.Should be appreciated that and It should be appreciated that in other embodiments, illustrated action may occur in different orders and/or occur with other action simultaneously.This Outward, implementation is perhaps without the most illustrated feature.
Fig. 7 explanation is used for activating LED (such as, green LED D in LED information display system (such as, LED information display system 10)GAnd/or it is blue Color LED DB) the example of method 300.At 302, receive nominal Active time (such as, the red LED including defining LED Activationary time) luma data (such as, luma data GSD) and define the compensation time data (example of extra activationary time of LED As, compensate time data CTF) numeral input (such as, numeral input DIG_IN).At 304, based on compensating time data meter Calculate activationary time (such as, the activationary time T defining LEDACTRAnd/or TACTG) the compensation time (such as, compensate for time CT).? At 306, produce having of being associated with LED equal to nominal Active time and compensation time and the activation signal of activationary time (such as, activationary time ACTG and/or ACTB).At 308, activate LED via activation signal.
It is described above the example of the present invention.Of course for describing the purpose of the present invention, assembly or method can not be described Each be envisaged that combination, but art those skilled in the art are it will be recognized that other combination of many of the present invention and arrangement are Possible.Therefore, it is contemplated that contain to fall comprise in the range of the subject application of following claims all this type of Change, revise and change.

Claims (20)

1. a LED system, comprising:
Including the LED array of multiple LED, the plurality of LED respectively hang oneself activation with provide LED current by the plurality of LED with A kind of illumination in multiple color is provided；And
Being configured to activate the LED controller of the plurality of LED based on numeral input, described numeral input includes corresponding to described The luma data of the activation of multiple LED and farther include the sensitizing pulse width corresponding to each in the plurality of LED Compensation time data with maintain the plurality of LED be substantially identical activationary time, described compensation time data is based on described Corresponding one in the described multiple color of the corresponding each of multiple LED.
System the most according to claim 1, wherein said LED controller includes:
Compensating time controller, its compensation time data being configured to based on receiving calculates corresponding in the plurality of LED Green and blue led in the sensitizing pulse width of at least one relative to the activation arteries and veins of the red LED in the plurality of LED Rush the compensation time that width increases；And
Active controller, it is configured to produce based on described luma data and described compensation time have described corresponding activation arteries and veins Rush the activation signal of described redness, green and the blue led of width.
System the most according to claim 2, wherein said LED controller includes being configured to the circulation meter to clock signal The enumerator of the pulse width of several pulse signals to determine reception, when wherein said compensation time data includes described compensation Between be defined as the variable of part of pulse signal of described reception, wherein said active controller is configured to described reception The described part of pulse signal with by as described in the nominal Active pulse width that defines of luma data be added to define with as described in green The described sensitizing pulse width that at least one in color and blue led is associated.
System the most according to claim 3, wherein said variable includes the described compensation the definition for the period of described green LED For described reception pulse signal Part I the first variable and be institute by the described compensation the definition for the period of described blue led Stating the second variable of the Part II of the pulse signal of reception, wherein said active controller is configured to the arteries and veins of described reception Rush the described Part I of signal to be added with described nominal Active pulse width with described in defining and being associated with described green LED Sensitizing pulse width and the described Part II of the pulse signal of described reception is added with described nominal Active pulse width with Define the described sensitizing pulse width being associated with described blue led.
System the most according to claim 2, wherein said compensation time data by described compensation the definition for the period be based on time The additional pulse width of the cycle-index of clock signal, wherein said active controller be configured to by described additional pulse width with By as described in the nominal Active pulse width that defines of luma data be added with define with as described in green and blue led at least one The described sensitizing pulse width that person is associated.
System the most according to claim 5, wherein said compensation time data defines the first of described green LED and additionally swashs Pulse width of living and the second extra sensitizing pulse width of described blue led, wherein said active controller is configured to institute State the first extra sensitizing pulse width to be added with described nominal Active pulse width to define the institute being associated with described green LED State sensitizing pulse width and be added to define with described nominal Active pulse width by the described second extra sensitizing pulse width with The described sensitizing pulse width that described blue led is associated.
System the most according to claim 5, when wherein said clock signal is first be associated with described LED controller Clock signal, wherein said LED controller includes being configured to producing based on described first clock signal and has higher than described the The frequency multiplier of the second clock signal of the frequency of one clock signal, wherein persistence time factor data are by boundary during described compensation It is set to the extra sensitizing pulse width of cycle-index based on described second clock signal.
System the most according to claim 1, wherein said LED controller includes rate of activation controller, described activation speed Degree controller is configured to arrange the rate of activation of the plurality of LED based on described compensation time data.
System the most according to claim 8, wherein said rate of activation controller is configured in the plurality of LED The described rate of activation of red LED is set to constant speed, and is configured to come individually and dynamic based on described compensation time data The described rate of activation of the green LED in the plurality of LED and each in blue led is set to state.
10. a LED display system, it includes the LED information display system of claim 1.
11. 1 kinds are used for the method activating the LED in LED system, and described method includes:
Receiving numeral input, it includes defining the luma data of the nominal Active pulse width of described LED and defining described LED's The compensation time data of extra sensitizing pulse width；
The compensation time of the sensitizing pulse width defining described LED is calculated based on described compensation time data；
Produce having of being associated with described LED equal to described nominal Active pulse width and described compensation time and described in The activation signal of sensitizing pulse width；And
Described LED is activated via described activation signal.
12. methods according to claim 11, wherein said LED is green LED or blue led, wherein said ash exponent number According to the sensitizing pulse width that described nominal Active pulse width is defined as the red LED being approximately equal in described LED information display system.
13. methods according to claim 11, wherein calculating the described compensation time includes:
Receive the pulse signal with the pulse width defined；
To the cycle count of clock signal to determine the pulse width defined described in described pulse signal；
Based on described compensation time data by described compensation Time Calculation be described in the part of pulse width that defines.
14. methods according to claim 11, wherein said compensation time data by described compensation the definition for the period be based on The extra sensitizing pulse width of the cycle-index of clock signal, wherein calculating the described compensation time includes described clock signal Described cycle-index is added with described nominal Active pulse width.
15. methods according to claim 14, wherein said clock signal is the first clock being associated with LED controller Signal, wherein said method farther includes that the frequency of described first clock signal is multiplied by multiplication factor and is higher than to produce to have The second clock signal of the frequency of described first clock signal, wherein calculating the described compensation time includes believing described second clock Number described cycle-index be added with described nominal Active pulse width.
16. methods according to claim 11, it farther includes dynamically to arrange institute based on described compensation time data State the rate of activation of multiple LED.
17. 1 kinds of LED systems, comprising:
Including the LED array of multiple LED, the plurality of LED includes red LED, green LED and blue led, its activation of respectively hanging oneself To provide by the LED current of the plurality of LED to provide illumination；And
LED controller, it is configured to receive the numeral input including luma data and compensation time data, described LED control Device includes:
Compensating time controller, it is configured to calculate corresponding to described green LED and institute based on described compensation time data State the sensitizing pulse width compensation time relative to the increase of the sensitizing pulse width of described red LED of blue led；
Active controller, it is configured to produce for described redness, green based on described luma data and described compensation time And the activation signal with described corresponding sensitizing pulse width of blue led；And
Multiple LED drivers, it is configured to activate described redness, green and blue led based on described activation signal.
18. systems according to claim 17, wherein said LED controller farther includes to be configured to clock signal Cycle count to determine the enumerator of the pulse width of the pulse signal of reception, wherein said compensation time data includes institute State the persistence time factor data of the part compensating the pulse signal that the definition for the period is described reception, wherein said active controller Be configured to the described part of the pulse signal by described reception with by as described in luma data define as described in nominal Active arteries and veins Rush width to be added to define the described sensitizing pulse width being associated with described green and blue led.
19. systems according to claim 17, wherein said compensation time data include by described compensation the definition for the period be The persistence time factor data of the extra sensitizing pulse width of cycle-index based on clock signal, wherein said active controller Be configured to by described extra sensitizing pulse width with by as described in luma data define as described in nominal Active pulse width phase Defined the described sensitizing pulse width being associated with at least one in described green and blue led.
20. systems according to claim 17, wherein said LED controller includes rate of activation controller, described activation Speed control is configured to the described rate of activation of described red LED is set to constant speed and is configured to based on described Compensate time data and the described rate of activation of each in described green and blue led individually and is dynamically set.
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CN109872680B (en) * 2019-03-20 2020-11-24 京东方科技集团股份有限公司 Pixel circuit, driving method, display panel, driving method and display device
WO2024113162A1 (en) * 2022-11-29 2024-06-06 西安青松光电技术有限公司 Luminance compensation method and apparatus, device, and storage medium

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